By: Doug S (foo.delete@this.bar.bar), October 17, 2021 1:33 pm
Room: Moderated Discussions
me (me.delete@this.me.com) on October 17, 2021 12:31 pm wrote:
> > But not always practical. If you have only one cluster at a certain site or dedicated to a certain
> > application suite / function, you would have to expand with models containing older CPUs instead
> > of getting newer/better ones, need to replace everything when you upgrade, etc.
> >
>
> If the downtime of shutting down a VM, migrating to a new cluster and starting
> it back up is unfeasible... you're probably not upgrading unless you have to.
Upgrades can use live migration. Everything is pretty well automated (though you can manage it manually if desired) so you can install new servers, add them to the cluster, and some of the running VMs will soon be automatically and transparently migrated to them to balance the overall load.
> > But not always practical. If you have only one cluster at a certain site or dedicated to a certain
> > application suite / function, you would have to expand with models containing older CPUs instead
> > of getting newer/better ones, need to replace everything when you upgrade, etc.
> >
>
> If the downtime of shutting down a VM, migrating to a new cluster and starting
> it back up is unfeasible... you're probably not upgrading unless you have to.
Upgrades can use live migration. Everything is pretty well automated (though you can manage it manually if desired) so you can install new servers, add them to the cluster, and some of the running VMs will soon be automatically and transparently migrated to them to balance the overall load.